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Training objective

DDR configuration

Learn about the DDR

Learn about ISDN technology

ISDN configuration

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DDRis the abbreviation of Dial-On-DemandRouting

DDRis applicable to PSTNandISDN

DDRis not a protocol and has no international standard

Brief introduction to DDR

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Physical interface

Dialer interface

Dial-up interface

Dial-up str ing

Dialer l ist

S tandard DDR

Flex ib le DDR

Nouns related to DDR

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DDR configuration preparations

Specify on which router and which interface to run

DDR

Specify the interface type

Specify whether to receive calls or initiate calls atthese interfaces

Select the standard DDR mode or flexible DDR mode

Configure DDR

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Configure Dialer-list

Configure an interface to initiate or receivecalls

Configure a DDR interface (including theconfiguration of Dialer interface)

Configure DDR-related parameters

Configuration of standard DDR

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Dialer Interface

1

Dialer Interface

2

Introduction to Dialer interface

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Configure a Dialer-list

dialer-list dialer-groupprotocol

protoco l -name { permit | deny }

Put a dial-up port into a Dialer-list

dialer-group group-number

Configure a Dialer-list

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Enable DDRdialer in-band

Set dialer string

Set the dialer string when initiating calls to a single point

dialer string dial-string[ isdn-address]

Set different dialer strings in terms of different destinations

dialer map protocol next-hop-address dialstr ing [ isdnsubaddress]

Define different rates for an ISDN interfacedialer map protocol next-hop-address[ speed 56 | speed 64 ] dialstring [

isdnsubaddress]

Configure an interface to initiate calls

Initiate calls to multipoints

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Configure usersusernamenamepassword 0/7password

Enter the physical interface configuration mode

interface interface-type interface-number

Enable DDR

dialer in-band

Encapsulate PPP

encapsulation ppp

Select a verification mode

ppp authentication { chap | pap }

Set the association between remote users and protocol addresses

dialer mapprotocol next-hop-addressnamehostname

Receive calls from multipoints

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Enable DDR

dialer in-band

Encapsulate a link layer protocol PPP

encapsulation pppIf authentication is needed, please select aauthentication mode and configure relatedparameters

Configure relationship between the remote

interface protocol address, user name and dial-upstring

dialer map p r o t o c o l nex t - hop - add r e s snameho s t n am e d i a l e r s t r i ng [ i s d n s u b a d d r e s s ]

Initiate calls to and receive calls frommultipoints

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Enable DDR

dialer in-band

Encapsulate a link layer protocol PPP

encapsulation pppIf authentication is needed, please select aauthentication mode and configure relatedparameters

Configure relationship between the remote

interface protocol address, user name and dial-upstring

dialer map p r o t o c o l nex t - hop - add r e s snameho s t n am e d i a l e r s t r i ng [ i s d n s u b a d d r e s s ]

Initiate calls to and receive calls frommultipoints

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Relations among various elements inflexible DDR

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Configure a dialer-list

Configure a dialer interface

Configure the characteristics of DDR for adialer interface

Configure a physical port

Configuration of a flexible DDR

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Create a dialer interfaceinterface dialernumber

Set an IP addressip addressaddress mask

Set PPP encapsulationencapsulation ppp

Enable a flexible DDR

dialer remote-namename

Configure a dialer interface

Set a dial-up stringdialer-stringstring

Set corresponding dialer pool numberdialer poolnumber

Set a dialer interface as belonging to a dialergroupdialer-groupnumber

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Set the idle time of a link

dialer idle-timeoutseconds

Set the idle time of a busy portdialer fast-idleseconds

Set the disconnection time of a linkdialer enable-timeoutseconds

Set the timefor the data need to wait for being sentdialer wait-for-carrier-timeseconds

Set the interval for automatic dialingdialer autodial-intervalseconds

Configure DDR features

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Enter the physical port configuration modeinterface interface-type interface-number

Encapsulate PPP

encapsulation ppp

Set the PPP authentication

ppp authentication chap | pap

Specify what dialer pool a port belongs to and setthe priority

dialer pool-membernumber[ priority priority ]

Configure a physical port

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Configure flow control at the dialer interface

dialer load-threshold load (configure flowcontrol threshold)

ppp multilink (configure MP)

Configure a physical interface with MP

ppp multilink

Configure the traffic detection cycle in theglobal configuration mode

flow-interval n minutes

Support of a flexible DDR for MP

C fi ti l f t d dDDR

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Configuration examples of a standard DDR(1)

RouterA RouterB

Tel:8810025 Tel:8810026

IP:10.110.0.1 IP:10.110.0.5

Modem Modem

PSTN

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RouterA

RouterC

Tel:8810029

Tel:8810027

IP:10.110.0.1

IP:10.110.0.3

Configuration examples of standard DDR (2)

Modem

Modem

RouterB

Tel:8810026

IP:10.110.0.2

PSTN

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RouterA

Tel:8810029

IP:10.110.0.1

Configuration examples of flexible DDR (1)

ModemModem

RouterB

Tel:8810026

IP:10.110.0.2

PSTN

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ConfigurationexamplesofaflexibleDDR

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RouterA

RouterC

Tel:8810148

Tel:8810163

Configuration examples of a flexible DDR(3)

Modem

Modem

RouterB

Tel:8810152

ISDN

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RouterA

Support of flexible DDR for MP

ISDN

NAS

163/169I n t e r n e t

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Monitorring and maintenance of DDR

Display DDR interface information

show dialer [interface type number]

Display any debugging information ofDDR

debug dialer event (Display DDR callset-up information)

debug dialer packet (Display DDRpacket sending information)

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Precautions in DDR configuration

dialer-group must be configured

Attention about some configurations aboutsynchronous/asynchronous serial interfacewhen DDR has been enabled on it

Configure a network layer address

In flexible DDR configuration mode,configure PPP when incoming calls arereceived

In standard DDR configuration mode,configure PPP when incoming calls are

O i f ISDN t h l

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ISDN is an all-digital service developed in

the 70s

ISDN provides end-to-end digital connection

ISDN protocol model of ITU-T

User-network interface specification of ISDN

Overview of ISDN technology

ISDN

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High bandwidth available(128K)

Dial-on-demand

Fast connection

High performance-price ratio

Security

PAP,CHAP and RADIUS

Household user

Access

Server

Server

Corp.Network

ISDN

ISDN

ISDN ( ti d)

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128kbps

2B

D 16k

64k*230B

D

2Mbps

64k*

64k

asic ra te in ter face

BRI )

Single physical connection

Two logic connections

Applicable to client

Pr im ary rate in ter face(PRI)

Single physical ocnnection

30 logic connections

Applicable to central nodes

ISDN (continued)

ISDN t l d l f ITU T

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M

C

U

ISDN protocol model of ITU-T

User-networkinterfacespecificationof

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TE2 TA

TE1 NT2 NT1

12345

Usernetwork interface specification ofISDN

Configure ISDN BRI interface

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Run IP network protocol on ISDN BRI interface

Run IPX network protocol on ISDN BRI interface

Access Internet via ISDN BRI interface

Configure ISDN BRI interface

RunIPprotocolon ISDNBRI

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Configure ISDNprotocol parameters

Configure IP address on ISDN BRI interface

Configure call destination

Configure encapsulation link layer protocol and authentication

Configure Dialer Group and Dialer List used to activate calls

Configure DDR parameters

Configure t IP routing informations

Run IP protocol on ISDN BRIinterface

Configuration examples

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Configuration examples

Remote Site

Central Site

ISDN

R n IPXprotocolonISDNBRIinterface

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Configure ISDNprotocol operational parameters

Enable IPX

Configure the IPX network nuber of the ISDN BRI interface

Configure outgoing Dialer Map to a destination

Configure link layer encapsulation protocol PPP and authenticationConfigure Dialer Group and Dialer List to activate calls

Configure DDR operational parameters

Run IPX protocol on ISDN BRI interface

Configure ISDN Protocol

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Configure called number or subsidiary address

to be checked of digital incoming calls

Configure called number or subsidiary addressto be checked of analog incoming calls

Configure ISDN Protocol

Monitoring and maintenance of ISDN

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Display call information currently

activated

Display the called number and

subaddress to be checkedDisplay current status of an ISDN

interface

Display the value of an ISDN timer

Display the type of an ISDN interface

gprotocol

Key points in this chapter

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Learn about basic principle DDR

Master the basic configurations of DDRLearn about ISDN technology

Master the basic configurations of ISDN

Key points in this chapter